学习面向对象中依赖关系，修改程序出现问题，不会建set,get感觉（新手啊，然后程序都敲好了）

package public class BankId {
     //声明属性
    private String id;
    private String pwd;
    private double balance;


 

     //声明数组，保存日志
     private String[] logInfo = new String[3];
     private int index;




    //有三个参数的构造方法
    BankId(String id,String pwd,double balance){
        //System.out.println("BankId(String id,String pwd,double balance)");
        this.id = id;
        this.pwd=pwd;
        this.balance = balance;
    }



 

   

    //查看余额
    double getBalance(){
        return balance;
    }
   

    //存款活期
    public void deposit(double amount){
        balance += amount;
      

        Logger.log(this,"日志，存款成功"+amount);
        //if(inde>2){
        //    inde = 0;
        //}
        //logInfo[inde]="活期的存款为："+amount;
        //inde++;
    }
    //存款  定期
    public void deposit(double amount, int term){
        balance += amount;
      

        Logger.log(this,"日志，存款成功"+amount);
        //if(inde>2){
        //    inde = 0;
        //}
        //logInfo[inde]="活期的存款为："+amount;
        //inde++;
    }
   

    //取款，不能透支
    public boolean withdraw(double amount){
        if (amount > balance){
            Logger.log(this,"日志，存款失败"+amount);
            //if(inde>2){
            //    inde = 0;
            //}
            //logInfo[inde]="取款失败："+amount;
            //inde++;
            return false;
        }else{
            balance -= amount;
         

            Logger.log(this,"日志，存款成功"+amount);
            //if(inde>2){
            //    inde = 0;
            //}
            //logInfo[inde]="取款成功："+amount;
            //inde++;
            return true;
        }
    }


    //返回日志数组
    public String[] getlogInfo(){
        return this.logInfo;
    }
}

package class Logger {
    public static void log(BankId account,String msg){
        String[] logInfo =account.getlogInfo();
        int index = account.getindex();
      

        if(index>2){
            index=0;
        }
        logInfo[index]=msg;
        index++;
        account.setindex(index);//就setloginfo和setloginfo没有前面定义
    }
   

    public static void printLog(BankId account){
        String[] LogInfo = account.getlogInfo();
        for (String s:logInfo){
            if(s!=null){
                System.out.println("日志"+s);
            }
            else{
                break;
            }
        }
    }
}

package public class TestBankId {

    /**
     * @param args
     */
    public static void main(String[] args) {
        BankId account1 = new BankId("312214","231244",5200);
      

        account1.deposit(2222);
      

        account1.withdraw(1400);
        account1.withdraw(1400);
      

        String[] logInfo =account1.getlogInfo();
      

        Logger.printLog(account1);
      


    }

}